John w



(No Model.)

J. W. RAPP. COLUMN OR POST.

No. 596,217. Patented Dec. 28,1897.

WITNESSES HIS ATTORNEY mz Nonms PETERS co. PHOTO LITNll. wAsumamN, n. c.

UNITED STATES ATENT OFFICE.

JOHN W. RAPP, OF NEW YORK, N. Y.

COLUMN OR POST.

SPECIFICATION forming part of Letters Patent No. 596,217, dated December28, 1897. A li tion fil d December 18, 1896. Serial No. 616,227- (Nomodel.)

To all whom, it may concern:

Be it known that I, JOHN W. RAPP, of the city, county, and State of NewYork, have invented a certain new and useful Improvement in Columns orPosts, of which the following is a specification.

My invention relates to the construction of a column or post forarchitectural or structural purposes and one which, among otherfeatures, possesses the quality of being fireproof.

I will describe a column or post embodying the features of myimprovement, and then point out its novelty in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a columnor post embodying my improvement, the middle portion of the same beingbroken away. Fig. 2 is a horizontal cross-section through the column orpost.

Similar letters of reference designate corresponding parts in bothfigures.

The column or post constituting the subject of this invention is ofbuilt-up construction, the various parts forming the complete articleconsisting of sheet metal of suitable dimensions.

In carrying my invention into effect I employ for the center of thecolumn or post T- bars made of sheet metal and consisting each of ayoke-shaped web portion and laterallyprojecting flanges, as fully setforth in Letters Patent No. 557,147, granted to me March 31, 1896, towhich I refer for a more detailed description.

Each column or post A preferably comprises four of these T-bars, asshown in Fig. 2. Two of these (marked B B) are arranged with theiroutwardly-extending flanges b in juxtaposition. Preferably astrengtheningstrip 0 is secured within the bars B B, as by pinching thesame between the bars, or it is held in place in any other suitablemanner.

D D designate two additional T-bars arranged on an axial line at rightangles to that of the bars B B.' The flanges b of the T-bars' B B arefirmly secured to the T-bars D D, resulting in a rigid column or post. Afinished appearance is imparted to the article by inclosing the interiorT-bars within an outer envelop E, of suitable material, which may becircular in outline or corrugated, as thought desirable.

The space inclosed by the envelop E and base G will of course beprovided for the column.

Having described my invention, what I consider as new, and desire tosecure by Letters Patent, is

1. A column or post comprising a number of T-bars consisting each of ayoke-shaped web and laterally-projecting flanges, two of said bars beingarranged with their flanges in juxtaposition, and other bars on an axialline at right angles thereto, substantially as described.

2. A column or post comprising four T- bars consisting each of ayoke-shaped web and laterally-projecting flanges, two of said bars beingarranged with their flanges in juxtaposition, and two arranged at rightangles to said latter bars and inclosing the flanges thereof,substantially as described.

3. A column or post comprising four T- bars consisting each of ayoke-shaped web and laterally-projecting flanges, two of said bars beingarranged with their flanges in juxtaposition, a strengthening-stripinclosed by the web portions of said latter bars, and two bars arrangedat right angles to the firstnamed bars and inclosing the flangesthereof, substantially as described.

4. A column or post. comprising four T- bars consisting each of ayoke-shaped web and laterally-projecting flanges, two of said bars beingarranged with their flanges in juxtaposition, and two at right angles tothe first and inclosing the flanges thereof, and a surrounding casing,substantially as described.

In testimony whereof I have signed my name to-this specification in thepresence of two subscribing witnesses.

JOHN w. RAPP.

